Apparatus for removing steam from grinders



Sept. 21, 1937.

F. W. PARTSCH APPARATUS FOR REMOVING STEAM FROM GRINDERS Filed Jan. 29,1934 I H j Jzj ,7 4:4 3 i 7;M(/V'IN%ENTOR:

J ZWM ATTORNEY Patented Sept. 21; 1937 PATENT orr cs APPARATUS FORREMOVING STEAM FROM GRINDERS Frank W. Partsch, Jackson Heights, N. Y.,as-

signor to J. 0. Ross Engineering Corporation, New York, N. Y., acorporation of New York Application January 29, 1934, Serial No. 708,724

1 Claim.

This invention relates to a method and apparatus for removing steam frompaper pulp grinders. f

In the operation of paper pulp grinders a large volume of steam isgenerated which is obnoxious and hazardous to the workmen in the ,roomand undesirable by reason of its effect on other machinery and thebuilding itself. Various attempts have been made to remove the steam bymeans of canopies or by exhausting the steam from the room andreplacement by warm air.

Such methods have been costly in operation and at times inefiicient. Inaddition, these methods were applicable to the old small capacitygrinders of about six tons per twenty-four hours. A new type of pocketgrinder has been developed having from twenty to forty tons capacity intwenty-four hours- The lath or jigging device for. roughing the stone ison the top instead of at the back where a removable cover or housing wassometimes utilized in previous types to remove the steam generated. Withthe new type of grinder an opening is necessary above the dam and thisopening cannot be covered due to the necessity of continuous inspectionduring operation in order that slivers may be removed and to note thecondition of the pulp. This opening permits the escape not only of thesteam generated during the grinding but also the steam arising from thestream of pulp.

One of the objects of this invention is to provide a simple andefficient means for carrying off the steam generated during the grindingof pulp.

A further object of the invention is to remove the steam generated fromthe grinding of pulp from the point of generation to a predetermineddelivery point.

A still further object of the invention is to remove the steam escapingfrom said opening by suitable means in order to permit continuousinspection through an opening on the outgoing side of the grinder.

Pocket grinders comprise a rotatable grindstone about which are radiallyplaced a plurality of devices for holding blocks of wood to be groundinto pulp against the grindstone.

In the older types an opening was left in the housing at the back togive access to the grindstone for the purpose of jigging the stone andthis opening was sometimes covered by a removable housing to remove thesteam. In the new form the jigging is done at the top and the removingof steam at that point is impracticable.

Referring to the drawing:

Figure 1 is a view principally in cross section of a pulp grinderembodying the principles of my invention.

Figure 2 is a plan view of the steam removal means for two of saidgrinders. Figure 3 is a detail sectional view of a housing for thepurpose of removing steam to prevent leakage from the grinder housingtaken on the line 3, 3, of Figure 2.

Figure 4 is a detail sectional view of the steam removal intake at thefront or dam end taken on the line 4, 4-, of Figure 2.

As the pulp grinder mechanism is not properly a part or this inventionthe specific description of the details other than required to describethis invention are omitted.

It should be borne in mind that during opera-.

tion there is practically no air entering the outgoing end of thegrinders and passing through the grinder to the box at the back. Thegrinder pockets are supported by columns I on a concrete base 2. Belowthe grindstone 3 is a pool 4 having a dam. 5. Pistons 6 maintain thewood in contact with grindstone 3. Water is used in the grindingoperation. The grinding of the pulp generates steam. A small amount ofthe steam is taken care of by housing 1 at the rear while the majorportion of the steam emerges from the opening 8 at the outgoing or damend of pool 4.

I have found that an open side chamber 9 connected by conduits In to anexhaust fan or other form of gaseous exhaust device II will collect andremove the vapor and steam issuing from the opening 8 above the dam. Thepreferable location of such exhaust chamber 9 is a short distance aboveopening 8 in order that there shall be an opportunity for the creationof a suction to contract and entrap the escaping steam. The

relatively small amount of steam at the rear can be removed by conduitsl3 connected to housing 1. Conduits l3 likewise connect with exhaust fanH. In this way the steam may be removed and the structure is applicableto the various designs of pocket type pulp grinders that are now in use.

This invention has the further advantage of removing the steam from themass of pulp as well as from the grinder, thereby reducing the annoyanceof steam that otherwise might leak from the pulp delivery systems fromthe grinder as well as removing the steam from the grinding housings.

What I claim is:

The combination in a pulp grinder of the type having a rotatable stonemounted on a horizontal axis located above a. pool to run with itsperipheral portion in said pool, and a jigging device at the top betweenfront and rear radially located wood boxes, said pool being formed by adam and extending in front and rear of said stone, and there being aninspection opening between the top of the dam and bottom of said frontwood box; a system of steam removal including a plurality of conduitsconnecting with plural sources of steam generated by said stone ingrinding and having interpolated in the sys-- tem a fan for generatingsuction, the points of FRANK w. PARTSCI-I.

